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A learning a day, since May 12 2008, by Rohan.
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William Kamkwamba

2025-07-12 19:13:00

We saw “The Boy Who Harnessed the Wind” a few months ago. It is a remarkable tale of William’s ingenuity and perseverance amidst severe famine in Malawi.

The story is set in 2002 when William’s family struggles to survive as farmers in Malawi – preventing him from continuing his education. However, he discovers a book about energy production and gets inspired to learn English to understand the content. That then leads to him gathering materials from junkyards – improvising discarded items like plastic pipes and bicycle parts – to build his windmill.

After a seemingly unending set of setbacks and skepticism, he finally builds a functional windmill that generates electricity for his home and village. That in turn improves powers a water pump that improves agricultural productivity.

Stories like this never fail to get me thinking about privilege. The amount of privilege we have is proportional to the number of essentials that people around the world worry about that we don’t have to think about.

It also reminded me about the massive role energy infrastructure play in enabling privilege. Access to energy is a gamechanger.

And, finally, if a plucky boy in Malawi never gave up on his desire to make a difference to his community, there’s so much more I can do as well.

A better solution to visa applications

2025-07-11 19:51:00

There are few things I hate more than filling up visa applications. I get the problem that rich countries face – they have too many people looking to get in and stay illegally. I get the importance of rigorous checks.

That said, I think the solutions today are completely broken – especially for tourist visas.

Here’s the solution I wish existed for tourist visas –

(1) The ideal solution would be one global database – it would be like a visa credit score. It contains a record of all past travel and has one central repository of the stuff we’re asked for. Every time we travel, we just upload the key documents in one place – bank balances, insurances, etc. We print the latest and submit.

A key feature would be the ability to link individual accounts to families so we can manage it all in one place vs. having to go through a separate ID/application for each person.

Ideally we’d have a private company ink partnerships with authorities across companies. But it won’t come easy – I understand that.

(2) The other alternative that I think would be implementable would be for countries to just pick a nation that has rigorous checks. I appreciate nations that say – if you’ve got a US visa, then you get visa on arrival.

Great, that works too.

And while you’re at it, charge everyone equally. I understand it is a source of revenue. But it is ironic that richer nation visitors are subsidized by visitors from poorer nations who pay exorbitant visa fees. For context, a family of 4 might pay well over $800 for the privilege of submitting visa applications to go the UK or New Zealand.

I’m not holding my breath for anything to change anytime soon. I don’t plan on running for politics in this lifetime either.

But if I did, this would be on the agenda.

Failure conditions

2025-07-10 19:06:00

Failure is a better teacher than success because it creates the conditions for reflection on what we might have done wrong.

The key, for us, is to not wait for failure to create the conditions for reflections and learning.

The values they discern

2025-07-09 19:07:00

There’s a simple parenting rule – the values you pass on to your kids are the values they discern from your actions. There is little correlation with the values you might intend to pass on or talk about.

Applies just as much to any leadership role. You can, for example, talk about long-term thinking all you want. But if all you reward is short-term thinking, it is what you will get.

A taste for saltwater

2025-07-08 19:01:00

When profiling stories of exceptional people, Shane Parrish on the Farnam Street blog often writes about how they acquired “a taste for saltwater.” A taste for saltwater is his analogy for their ability to deal with discomfort.

A predictable trait in people who’ve accomplished something exceptional is their capacity to endure discomfort.

Fructose to the liver

2025-07-07 19:53:00

Researchers at Wash U shared some fascinating findings on the indirect impact of fructose on cancer.

Fructose is ubiquitous via “high fructose corn syrup” – the sweetener used in most ultra-processed food. Interestingly, fructose does not directly aide the growth of cancer cells.

Instead, the liver converts fructose into nutrients that cancer cells use. Fructose effectively accelerates cancer/tumor growth by 2x.

Fructose consumption has grown 15x per person in the past century. That’s a lot of cancer acceleration enabled by this growth.

The negative impact of ultra-processed foods in our diet is becoming clearer as time progresses. Studies like this go a long way in understanding the exact nature of their impact.